Mercurial > dive4elements > river
comparison flys-client/src/main/java/de/intevation/flys/client/server/SQKMChartServiceImpl.java @ 2953:75e9eab05ee4
Added overview chart to sq relation period input panel.
flys-client/trunk@4932 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Raimund Renkert <raimund.renkert@intevation.de> |
|---|---|
| date | Wed, 11 Jul 2012 11:24:27 +0000 |
| parents | |
| children |
comparison
equal
deleted
inserted
replaced
| 2952:3cacd42a0336 | 2953:75e9eab05ee4 |
|---|---|
| 1 package de.intevation.flys.client.server; | |
| 2 | |
| 3 import org.apache.log4j.Logger; | |
| 4 | |
| 5 import java.io.IOException; | |
| 6 import java.io.InputStream; | |
| 7 import java.io.OutputStream; | |
| 8 | |
| 9 import javax.servlet.http.HttpServlet; | |
| 10 import javax.servlet.http.HttpServletRequest; | |
| 11 import javax.servlet.http.HttpServletResponse; | |
| 12 | |
| 13 import org.w3c.dom.Document; | |
| 14 import org.w3c.dom.Element; | |
| 15 import org.w3c.dom.NodeList; | |
| 16 | |
| 17 import de.intevation.artifacts.common.utils.XMLUtils; | |
| 18 | |
| 19 import de.intevation.artifacts.httpclient.exceptions.ConnectionException; | |
| 20 import de.intevation.artifacts.httpclient.http.HttpClient; | |
| 21 import de.intevation.artifacts.httpclient.http.HttpClientImpl; | |
| 22 | |
| 23 import de.intevation.artifacts.httpclient.http.response.StreamResponseHandler; | |
| 24 | |
| 25 public class SQKMChartServiceImpl | |
| 26 extends HttpServlet | |
| 27 { | |
| 28 private static final Logger log = | |
| 29 Logger.getLogger(FixingsKMChartServiceImpl.class); | |
| 30 | |
| 31 public static final String SERVICE_NAME = "sq-km-chart"; | |
| 32 | |
| 33 public SQKMChartServiceImpl() { | |
| 34 } | |
| 35 | |
| 36 public void doGet(HttpServletRequest req, HttpServletResponse resp) { | |
| 37 | |
| 38 log.info("SQKMChartServiceImpl.doGet"); | |
| 39 | |
| 40 String url = getServletContext().getInitParameter("server-url"); | |
| 41 String locale = req.getParameter("locale"); | |
| 42 String filter = req.getParameter("filter"); | |
| 43 | |
| 44 if (filter == null || filter.length() == 0) { | |
| 45 log.warn("Missing 'filter' parameter."); | |
| 46 return; | |
| 47 } | |
| 48 | |
| 49 if (locale == null || locale.length() == 0) { | |
| 50 locale = "de"; | |
| 51 } | |
| 52 | |
| 53 Document filterDoc = XMLUtils.jsonToXML(filter); | |
| 54 | |
| 55 if (filterDoc == null) { | |
| 56 log.warn("Creating filter document failed."); | |
| 57 return; | |
| 58 } | |
| 59 | |
| 60 InputStream in; | |
| 61 | |
| 62 try { | |
| 63 HttpClient client = new HttpClientImpl(url, locale); | |
| 64 in = (InputStream)client.callService( | |
| 65 url, // XXX: Why? The URL is passed by construction already. | |
| 66 SERVICE_NAME, | |
| 67 filterDoc, | |
| 68 new StreamResponseHandler()); | |
| 69 } | |
| 70 catch (ConnectionException ce) { | |
| 71 log.error(ce); | |
| 72 return; | |
| 73 } | |
| 74 | |
| 75 resp.setHeader("Content-Type", guessMIMEType(filterDoc)); | |
| 76 | |
| 77 try { | |
| 78 OutputStream out = resp.getOutputStream(); | |
| 79 | |
| 80 byte [] buf = new byte[4096]; | |
| 81 int i = -1; | |
| 82 while ((i = in.read(buf)) >= 0) { | |
| 83 out.write(buf, 0, i); | |
| 84 } | |
| 85 out.flush(); | |
| 86 } | |
| 87 catch (IOException ioe) { | |
| 88 log.error(ioe); | |
| 89 } | |
| 90 finally { | |
| 91 try { in.close(); } | |
| 92 catch (IOException ioe) { /* ignored */ } | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 protected static String guessMIMEType(Document document) { | |
| 97 | |
| 98 NodeList formats = document.getElementsByTagName("format"); | |
| 99 | |
| 100 String format = "png"; | |
| 101 | |
| 102 if (formats.getLength() > 0) { | |
| 103 String type = ((Element)formats.item(0)).getAttribute("type"); | |
| 104 if (type.length() > 0) { | |
| 105 format = type; | |
| 106 } | |
| 107 } | |
| 108 | |
| 109 return "image/" + format; | |
| 110 } | |
| 111 } |